JPS6127495A - Laminated type heat exchanger - Google Patents

Abstract

PURPOSE:To swiftly repulse dew condensed water to improve the heat exchange efficiency by bending each of platen tube elements in a substantiallt V-shape in which each platen tube element is sloped downwardly from the intermediate point of the langth thereof as a top to bath ends thereof. CONSTITUTION:Tube elements 1 are diposed horizontally to constitite a lateral laminated type heate exchanger. All the tube element 1 are bent in a substantially V-shape in which each of tube element 1 gentely slopwe downwardly from an intermediated point in the longitudinal direction thereof as a top P to both ends thereof. The bending top P is not necessarily to be positioned at the center of the length of the tube element 1 but is preferably positioned within a range loccupying approximately 30% of the central part of the range l with respect to the total length L of the tube element 1. Further, the sloping angle theta may be small but it is preferable to be set to approximately 2-7 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a laminated heat exchanger used, for example, in an evaporator for air conditioning of an automobile.

BACKGROUND TECHNOLOGY This type of laminated heat exchanger generally generates heat by alternately laminating a pair of metal molded plates pressed to form heat medium passages and corrugated fins. An exchange part is formed, and a tank part for storing a heat medium is formed at both ends or one end of the exchange part. When such a laminated heat exchanger is used as a cartar evaporator, a tube element that includes a heat medium passage formed by each pair of molded plates is generally used. Vertical heat exchanger arranged vertically (
For example, it is often used as Utility Model Publication No. 56-6847). The reason for this is that by arranging the tube elements in a vertical direction, water droplets generated as dew water from the air flowing through the air circulation gap including the fins between the tube elements are quickly moved downward along the tube elements. By being able to eliminate. That is, when the tube element is configured as a horizontal type arranged horizontally (for example, Utility Model Publication No. 53-32375), the condensed water grows along the top of the tube element and is circulated within the heat exchanger. Since water tends to be blown away by the air and flow into the interior of the car, a so-called problem of water splashing, it is often used vertically to avoid this problem.

However, if the space in which the evaporator is housed is longer in the horizontal direction than in the vertical direction due to the structure of the automobile, or in other words if it is elongated horizontally, the above heat exchanger is used as a horizontal type rather than as a vertical type. This allows for a larger effective area for heat exchange, resulting in higher efficiency.

For example, as shown in a slightly exaggerated state in FIGS. 5 and 6, the area occupied by the upper and lower or left and right tank sections (22) and (23) located at both ends of the heat exchange section (21) However, the vertical type shown in FIG. 4 is relatively larger than the horizontal type shown in FIG. For this reason,
Compared to the area HXW when the effective area of the heat exchange part is vertical,
The area H'×W' is larger in the case of the horizontal type, and as a result, the horizontal type can be superior in terms of heat exchange efficiency.

Problems to be Solved by the Invention In view of the above-mentioned matters, the present invention aims to arrange the tube elements horizontally to ensure a relatively large effective heat exchange area. By solving the problem of the difficulty of quickly removing condensed water, which is the biggest problem of water splashing, we have made it possible to provide a laminated heat exchanger with even better heat exchange efficiency. It's about doing.

Means for Solving the Problems For the above purpose, the present invention provides a plurality of horizontally arranged plate-like tube elements and a corrugated tube interposed between adjacent ones of the tube elements. gated fins, and the plate-shaped tube element is bent into a gentle, substantially inverted V-shape that is inclined downward from the apex at the midpoint of its length to both ends. type heat exchanger.

Example Embodiments of the invention are shown in FIGS. 1 to 4.

In these figures, (1) indicates a plurality of plate-shaped tube elements each having a heat transfer medium passage (1a) configured as a substantially continuous hollow portion therein, and (2) indicates an adjacent tube element <1. ) (1) Corrugated fins interposed between the two, alternately stacked and joined together, (3) and (4) a heat transfer inlet header made of a metal tube and a rotor header, and (5) a Upper and lower side play 1
− is.

In this embodiment, the tube element (1) is:
In one preferred embodiment, it is constructed from a roll-bonded panel made of aluminum. That is, two aluminum plates are coated with an anti-crimping agent in a desired pattern, then stacked and crimped together, and the non-crimped portion is bulged out by fluid pressure, thereby creating a heat medium passage ( 1a) is used. (1b)
is the peripheral crimped part, (1C) is the middle groove-shaped crimped part (
(See Figure 3).

The tube elements (1) are arranged horizontally to form a horizontal stacked heat exchanger as shown in FIG. With the midpoint of the direction as the apex (P), it is bent into a gentle V-shape that slopes downward as it reaches both ends. This refraction apex (P) does not necessarily have to be located at the center of the length, but is preferably located at the entire length (L) of the tube element (1).
), the length range (ρ) that occupies about 30% of the central part
It is best to place it inside. Also, the angle of inclination (θ
) may be small, and is preferably set to about 2 to 70. If the position of the apex (P) and the angle of inclination (θ) deviate from the above range, the good function of removing condensed water may be impaired, or the upper and lower ends of the heat exchanger may be This is undesirable because disadvantages such as an increase in dead space below the center occur.

Furthermore, the negative side edge of the tube element (1), particularly the side edge on the outflow side of the air (A) to be heat exchanged, is provided with a rising edge that forms a waterway (6) by bending the edge obliquely upward. A rim is provided.

Tube elements laminated via fins (2) (
1) The heat medium inlet header (3) and the outlet header (4) are installed in the widthwise middle part of both ends of the group in a manner that they communicate with both ends of the heat medium passage (1a). is vertical,
i.e. mounted in a vertical arrangement.

Although not shown, preferably, the flow direction of the heat medium is changed for each predetermined number of tube element groups to cause the medium to flow in a meandering manner in each of the headers (3) and (4). A partition plate is provided to divide the heat exchange medium passage group into three, thereby forming a so-called three-bath type heat exchanger.

The corrugated fin (2) is generally made of aluminum, and has louvers cut and formed as shown in the figure.

In the above heat exchanger, the heat medium is fed from the inlet header (3) into the heat medium passage (1a) of the tube element (1) from one end thereof. This heat medium is preferably circulated in a meandering manner in the opposite direction for each group of tube elements, and during this time exchanges heat with the air flowing between the tube elements (1) (1), and is used as an evaporator. In the case of the heat exchanger used, evaporation occurs,
Eventually, it comes out of the outlet header (4) and is sent to a compressor, etc. (not shown).

On the other hand, due to the above heat exchange, the tube element (1)
As shown in Fig. 4, the condensed water that condenses on the surface of the fins (2) is governed by the slope of the tube element (1), and some of it flows along the groove-shaped crimp part (1C) in the middle part. As it flows down toward both ends, it is pushed by air (A) sent by a blower (not shown) and is blown sequentially from the windward side to the leeward side, and eventually collects in the waterway (6) blocked by the rising edge (7). It will be done. Then, this collected condensed water is transferred to the tube element (1) in the same way as above.
Due to the inclination of the tube element (1), the condensed water quickly flows toward both ends of the tube element (1), drips from both ends of the tube element (1) together with some of the condensed water that has flowed on the crimp portion (1C), and is discharged below the evaporator.

In addition, in the above illustrated embodiment, the tube element (1)
Although the present invention is not limited to this, the heat exchange medium passage may be formed by combining parts of two molded plates as in the past. . Of course, configuring the tube element (1) with a roll bond panel means that any pattern can be easily set for the heat medium circulation circuit, and there is great freedom of choice. Compared to the case where the heat exchanger is assembled, the number of assembly parts required for assembling the heat exchanger is reduced, the set time is shortened, and productivity is improved. hand,
Since a portion of the header can be constructed from pipe material as shown in the figure, the proportion of the area occupied by the ineffective heat exchange part of the front surface area of the heat exchanger can be extremely reduced, and depending on the design, the header can be used as an air circulation area. By locating the heat exchanger inside the header, it is possible to almost eliminate the occurrence of ineffective heat exchange parts due to the header and enjoy excellent advantages in terms of improved heat exchange performance, etc.

Effects of the Invention As described above, the present invention is a horizontal stacked heat exchanger in which ζ plate-shaped tube elements are arranged horizontally. Therefore, the proportion of the effective heat exchange portion in the front surface area of the heat exchanger can be increased by a considerable amount compared to that of the vertical type. This means that the heat exchange performance is improved accordingly.

Furthermore, horizontal heat exchangers have a smoother flow of heat medium than vertical heat exchangers, and from this point of view as well, improvement in heat exchange performance is expected.

Furthermore, in the heat exchanger of the present invention, the plate-like tube element has its longitudinal midpoint as the apex and is inclined downwardly from this point to both ends. Therefore, condensed water that inevitably occurs on the surfaces of the fins and tube elements is quickly discharged toward both left and right ends of the heat exchanger. Therefore, it is possible to prevent the so-called water splash phenomenon in which condensed water is scattered from the leeward edge of the heat exchanger to the outside and splashes on people in a car, for example. In addition, by being able to quickly remove condensed water from the surface of the heat exchanger in this way, it is possible to avoid adverse effects on the heat exchange effect due to condensed water adhering to the surfaces of the fins and tube elements, and from this point of view as well. This has the effect of improving heat exchange performance.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the heat exchanger according to the present invention, FIG. 2 is a right side view thereof, FIG. 3 is an enlarged sectional view of the front end side edge of the duplex element, and FIG. The same figure is an enlarged sectional view of the edge of one end, Figure 5 is a schematic front view of a vertical heat exchanger equipped with a conventional Dron cup header, and Figure 6 is the same (schematic diagram of a conventional horizontal heat exchanger). It is a front view. (1)...Plate-like tube niremen l-1(la)...
・Heating medium passage, (2)... corrugated fin,
(3)...Entrance header, (4)...Outlet header, (P)...Vertex, (θ)...Angle of inclination. that's all

Claims (4)

[Claims] (1) Comprising a plurality of plate-like tube elements arranged horizontally and corrugated fins interposed between adjacent tube elements,
A laminated heat exchanger characterized in that the plate-shaped tube element is bent into a gentle, substantially inverted V-shape that is inclined downward from the apex at the midpoint of its length to both ends. (2) The laminated heat exchanger according to claim 1, wherein the tube element is made of a roll bond panel. (3) Claim 1 or 2, wherein the bent top of the tube element is located within a length range of about 30% of the central portion of the tube element over its entire length.
Stacked heat exchanger as described in Section 1. (4) The laminated heat exchanger according to any one of claims 1 to 3, wherein the tube elements have an inclination angle of 2 to 7 degrees.